ch05-TheDataResource

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E. Wainright Martin

Carol V. Brown

Daniel W. DeHayesJeffrey A. HofferWilliam C. Perkins

MANAGINGMANAGINGINFORMATIONINFORMATION

TECHNOLOGYTECHNOLOGYFIFH EDII!"

CHAPTER 5

THE DATA RESOURCE


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2005 Pearson Prentie!Ha""

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Or%ani&ations o'"( not )'ntion "on% *it#o'tritia" +'siness (ata

Cost to re$"ae (ata *o'"( +e ,er- #i%#

Ti.e to reoni"e inonsistent (ata .a- +e too "on%

Data o)ten nee(s to +e aesse( /'i"-

1HY MANAGE DATA

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Data .o(e"in%in,o",es4 Met#o(o"o%- or ste$s )o""o*e( to i(enti)-

an( (esri+e (ata entities Notation or a *a- to i""'strate (ata entities

%ra$#ia""-

TECHNICALASPECTS OF

MANAGING THE DATA RESOURCEData model6

o,era"" .a$ )or +'siness (ata nee(e( to e))eti,e"- .ana%e

t#e (ata


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Entit-!re"ations#i$ (ia%ra. 8ERD9

Most o..on .et#o( )or re$resentin% a (ata .o(e" an(or%ani&ationa" (ata nee(s Ca$t'res entities an( t#eir re"ations#i$s

Entities6 t#in%s a+o't *#i# (ata are o""ete( Attri+'tes6 at'a" e"e.ents o) (ata t#at are to +e o""ete(

TECHNICALASPECTS OF

MANAGING THE DATA RESOURCEThe Data Model


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Page 135 Figure 5.1 Entity-Relationship Diagram

NOTE:#Entities are C$stomer% !r&er% an& Pro&$'t.#Attri($tes of the C$stomer entity 'o$l& (e

'$stomer last name% first name% street% 'ity% )

TECHNICALASPECTS OF

MANAGING THE DATA RESOURCEThe Data Model


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Enter$rise .o(e"in% 8a $roess )o's9 To$!(o*n a$$roa# Desri+es or%ani&ation an( (ata

re/'ire.ents at #i%# "e,e" in(e$en(ent o)re$orts sreens or (etai"e( s$ei)iations

Not +iase( +- #o* +'siness o$erates to(a-

TECHNICALASPECTS OF

MANAGING THE DATA RESOURCEData Modeling


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Enterprise !odeling "teps#

Di,i(e *or into .a


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>ie* inte%ration 8a (ata o't$'t )o's9 ?otto.!'$ a$$roa# Ea# re$ort sreen )or. (o'.ent

$ro('e( )ro. (ata+ases )irst @ ea#a""e( a 'ser ,ie*

TECHNICALASPECTS OF

MANAGING THE DATA RESOURCEData Modeling


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'ie( )ntegration "teps#

Create 'ser ,ie*s

I(enti)- (ata e"e.ents in ea# 'ser ,ie* an( $'t into astr't're a""e( a nor.a" )or.

Nor.a"i&e 'ser ,ie*s

Inte%rate set o) entities )ro. nor.a"i&ation into one (esri$tion

TECHNICALASPECTS OF

MANAGING THE

DATA

RESOURCE

Data Modeling

*ormali+ation6

$roess o) reatin% si.$"e (ata str't'res )ro. .ore o.$"eB

ones


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Page 13,

TECHNICALASPECTS OF

MANAGING THE

DATA

RESOURCE

Database Architecture

Dataase

s#are( o""etion o) "o%ia""- re"ate( (ata or%ani&e( to.eet nee(s o) an or%ani&ation

Dataase Ar%hite%ture6

*a- in *#i# t#e (ata are str't're( an( store( in t#e

(ata+ase


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TECHNICALASPECTS OFMANAGING THE DATA RESOURCE

SiB +asi (ata+ase ar#itet'res4

Hierar#ia" 8to$!(o*n or%ani&ation9

2 Net*or 8#i%#!,o"'.e transation $roessin%9

3 Re"ationa" 8(ata arran%e( in si.$"e ta+"es9

7 O+


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A D?MS #e"$s .ana%e (ata +- $ro,i(in%se,en )'ntions4

Data stora%e retrie,a" '$(ate

2 ?a'$

3 Reo,er-

7 Inte%rit- ontro"

5 Se'rit- ontro"

: Con'rren- ontro"

; Transation ontro"

Tools for Managing Data


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Page 130-12


Contains:

De)inition o) ea# entit-

re"ations#i$ an( (atae"e.ent

Dis$"a- )or.ats

Inte%rit- r'"es

Se'rit- restritions

>o"'.e an( si&es List o) a$$"iations t#at 'se

t#e (ata

Tools for Managing Data

Data Di%tionaryDire%tory 4DDD

entra" en-"o$e(ia o) (ata (e)initions an( 'sa%e

in)or.ation @ a (ata+ase a+o't (ata


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TECHNICALASPECTS OFMANAGING THE DATA RESOURCEDatabase Programming

6uery language

a 7 GL non$roe('ra" $ro%ra..in% "an%'a%e to o+tain

(ata )ro. a (ata+ase o)ten $ro,i(e( +- t#e D?MS

SQLquery language example:

"E7ECT 8RDER9: C;"T8!ER9: C;"T*A!E:

8RDER-DATE FR8! C;"T8!ER: 8RDER 21$25>

A*D C;"T8!ER.C;"T8!ER9 ?

8RDER.C;"T8!ER9


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T#e nee( to .ana%e (ata is $er.anent

Data an eBist at se,era" "e,e"s

A$$"iation so)t*are s#o'"( +e se$arate )ro. t#e(ata+ase

A$$"iation so)t*are an +e "assi)ie( +- #o* t#e-treat (ata

Data a$t're

2 Data trans)er

3 Data ana"-sis an( $resentation

MANAGERIAL ISSUES IN

MANAGING

DATA

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Principles in Managing Data


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Page 1$ Figure 5.


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MANAGING

DATA

Page 1

The Data Management Process

Figure 5. Asset !anagement Fun%tions


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Data Administration

Page 152

e- )'ntions o) t#e (ata a(.inistration %ro'$4

Promote and control data sharing

Analyze the impact of changes to application systems when data definitions change

Maintain the data dictionary Reduce redundant data and processing

Reduce system maintenance costs and improve system development productivity

Improve quality and security of data

Insure data integrity


MANAGING

DATA


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Data Administration

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e- )'ntions o) t#e (ata+ase a(.inistrator 8D?A94

T'nin% (ata+ase .ana%e.ent s-ste.s

Se"etion an( e,a"'ation o) an( trainin% on (ata+ase te#no"o%-

P#-sia" (ata+ase (esi%n

Desi%n o) .et#o(s to reo,er )ro. (a.a%e to (ata+ases

P#-sia" $"ae.ent o) (ata+ases on s$ei)i o.$'ters an( stora%e (e,ies

T#e inter)ae o) (ata+ases *it# te"eo..'niations an( ot#er te#no"o%ies

MANAGERIAL ISSUES INMANAGING DATA

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